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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Flash point

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Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

Penta-1,3-diene currentlyhas no harmonized classification at EU level in accordance with the CLP and DSD/DPD criteria. A Flammable liquid is defined asa liquid having a flash point of not more than 60oC, in accordance with the CLP classification criteria.


The value for flashpoint ofpenta-1,3-dieneof -29°C (closed cup) are reported in handbooks and referred in the International Chemical Safety Card (ICSC 1722) developed by the International Programme on Chemical Safety (IPCS). Flashpoint value reported for the registrant’s product specification is – 53 deg.C.


These flashpoint values correspond to Category 2 flammable liquids (flash point < 23oC and initial boiling point > 35oC).